Thanks everyone. There is such emptiness now that she is gone. Binky kept a close eye on Plucky behind bars for days till she died. In her final days, she finally decided to be nice to him as well at the bars, they even smooched.

Binky has the whole cage to himself now. When the cage was cleaned, he kept looking for Plucky to be at the other side, you could just see the moment that he realized that she was gone on his face.

He seems fine on his own. He has petit mal on top of his heart issues, which is probably why other pigs attack him, as it comes across as aggressive when he's absent for a few minutes.

He has a dollie now, which I put in different places around the cage when he doesn't see it, so he goes and looks for "her". I have an identical one, so it can be washed. I bought this upfront and spent lots of time finding a correct one. It's the size of a pigm has ears, the body is soft and can be used as a pillow. It's perfect. He's very sweet to her too and sleeps with it a lot.